Help I am a new member and have purchased a 1964 150cc guibileo but I cannot get it to run on idle can any one help with carb settings as I have run out of ideas.
Many Thanks Dave.
My last Gilera was in 1961 a 175 sport which I bent on a ford consul?

Thanks Nozem for the reply, the carb is a UB20BS I am not sure of needle setting or mixture. I have cleaned out tank all pipes were blocked and carb soaked and cleaned with cellulose thinners!!
Thanks Dave.

Thanks Nozem for the diagram its really strange the idle jet is about 12mm above the main jet so it seems starved of fuel, lifting the level in the float chamber seems to solve the problem.
Thanks again Dave.

Hi Nozem the float is 6.5 grms I have checked weight and its 6.4 so ok main jet is 95 pilot jet 45 needle tube is 260A, I have needle on No2 setting, there is a slight difference from diagram for jet size.
I went for a short ride on bike last night its fine at normal revs but still not right at low revs, I am having trouble with the rocking gear change never used one it could be my age 74 this year.